1 /*
2  * Copyright (C) 2014 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License
15  */
16 
17 package com.android.systemui;
18 
19 import android.app.Application;
20 import android.content.BroadcastReceiver;
21 import android.content.Context;
22 import android.content.Intent;
23 import android.content.IntentFilter;
24 import android.content.res.Configuration;
25 import android.os.SystemProperties;
26 import android.util.Log;
27 
28 import java.util.HashMap;
29 import java.util.Map;
30 
31 /**
32  * Application class for SystemUI.
33  */
34 public class SystemUIApplication extends Application {
35 
36     private static final String TAG = "SystemUIService";
37     private static final boolean DEBUG = false;
38 
39     /**
40      * The classes of the stuff to start.
41      */
42     private final Class<?>[] SERVICES = new Class[] {
43             com.android.systemui.keyguard.KeyguardViewMediator.class,
44             com.android.systemui.recent.Recents.class,
45             com.android.systemui.volume.VolumeUI.class,
46             com.android.systemui.statusbar.SystemBars.class,
47             com.android.systemui.usb.StorageNotification.class,
48             com.android.systemui.power.PowerUI.class,
49             com.android.systemui.media.RingtonePlayer.class
50     };
51 
52     /**
53      * Hold a reference on the stuff we start.
54      */
55     private final SystemUI[] mServices = new SystemUI[SERVICES.length];
56     private boolean mServicesStarted;
57     private boolean mBootCompleted;
58     private final Map<Class<?>, Object> mComponents = new HashMap<Class<?>, Object>();
59 
60     @Override
onCreate()61     public void onCreate() {
62         super.onCreate();
63         // Set the application theme that is inherited by all services. Note that setting the
64         // application theme in the manifest does only work for activities. Keep this in sync with
65         // the theme set there.
66         setTheme(R.style.systemui_theme);
67 
68         IntentFilter filter = new IntentFilter(Intent.ACTION_BOOT_COMPLETED);
69         filter.setPriority(IntentFilter.SYSTEM_HIGH_PRIORITY);
70         registerReceiver(new BroadcastReceiver() {
71             @Override
72             public void onReceive(Context context, Intent intent) {
73                 if (mBootCompleted) return;
74 
75                 if (DEBUG) Log.v(TAG, "BOOT_COMPLETED received");
76                 unregisterReceiver(this);
77                 mBootCompleted = true;
78                 if (mServicesStarted) {
79                     final int N = mServices.length;
80                     for (int i = 0; i < N; i++) {
81                         mServices[i].onBootCompleted();
82                     }
83                 }
84             }
85         }, filter);
86     }
87 
88     /**
89      * Makes sure that all the SystemUI services are running. If they are already running, this is a
90      * no-op. This is needed to conditinally start all the services, as we only need to have it in
91      * the main process.
92      *
93      * <p>This method must only be called from the main thread.</p>
94      */
startServicesIfNeeded()95     public void startServicesIfNeeded() {
96         if (mServicesStarted) {
97             return;
98         }
99 
100         if (!mBootCompleted) {
101             // check to see if maybe it was already completed long before we began
102             // see ActivityManagerService.finishBooting()
103             if ("1".equals(SystemProperties.get("sys.boot_completed"))) {
104                 mBootCompleted = true;
105                 if (DEBUG) Log.v(TAG, "BOOT_COMPLETED was already sent");
106             }
107         }
108 
109         Log.v(TAG, "Starting SystemUI services.");
110         final int N = SERVICES.length;
111         for (int i=0; i<N; i++) {
112             Class<?> cl = SERVICES[i];
113             if (DEBUG) Log.d(TAG, "loading: " + cl);
114             try {
115                 mServices[i] = (SystemUI)cl.newInstance();
116             } catch (IllegalAccessException ex) {
117                 throw new RuntimeException(ex);
118             } catch (InstantiationException ex) {
119                 throw new RuntimeException(ex);
120             }
121             mServices[i].mContext = this;
122             mServices[i].mComponents = mComponents;
123             if (DEBUG) Log.d(TAG, "running: " + mServices[i]);
124             mServices[i].start();
125 
126             if (mBootCompleted) {
127                 mServices[i].onBootCompleted();
128             }
129         }
130         mServicesStarted = true;
131     }
132 
133     @Override
onConfigurationChanged(Configuration newConfig)134     public void onConfigurationChanged(Configuration newConfig) {
135         if (mServicesStarted) {
136             int len = mServices.length;
137             for (int i = 0; i < len; i++) {
138                 mServices[i].onConfigurationChanged(newConfig);
139             }
140         }
141     }
142 
143     @SuppressWarnings("unchecked")
getComponent(Class<T> interfaceType)144     public <T> T getComponent(Class<T> interfaceType) {
145         return (T) mComponents.get(interfaceType);
146     }
147 
getServices()148     public SystemUI[] getServices() {
149         return mServices;
150     }
151 }
152